Metal-cutting knife.



F. H. WILLIAMS.

METAL CUTTING KNIFE.

APPLICATION FILED 001'. 16, 1911.

Patented Jan. 13, 1914.

W1 TNESSES Arrozzzvz STATES PATENT OFFICE.

FRANK H. WILLIAMS, OF BUFFALO, NEW YORK, ASSIGNOR TO ELIZABETH WURTZ, OF BUFFALO, NEW YORK.

METAL-CUTTING- KNIFE.

To all whom it may concern:

Be it known that I, FRANK H. VVILLIAMS, a citizen of the United States of America, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Metal- Cutting Knives, of which the following is a full, clear, and exact description.

My invention relates to metal-cutting knives and more particularly to knives used in cutting structural steel shapes.

The general objects of my invention have been to provide a cutting knife for cutting metal which would accomplish the operation quickly; one which would not distort the metal, but leave the ends of the two parts being out clean and free from numerous ragged edges; and one which would waste none of the material being cut.

I have accomplished the advantages and objects above mentioned, as well as many others not herein enumerated but which will be apparent to those skilled in the art, by my invention hereinafter described.

Reference is to be had to the accompanying drawings, forming part of this specification, in which like characters of reference indicate like parts throughout the several views of which:

Figure 1 is a front view of a simple form of my knife and shows a work piece for which this form is especially adapted. Fig. 2 is a sectional view of Fig. 1 taken on line A B of that figure. Fig. 3 is a sectional view of Fig. 1 taken on line CD of that figure. Fig. 1 is a front elevation of a pair of cutting knives adapted for cutting the I-beam shown in place. Fig. 5 is a sectional view of Fig. at taken on line EF of that figure. Fig. 6 is a sectional view of Fig. 4 taken on line G-H of that figure. Fig. 7 is a front elevation of a knife embodying my invention and shows the preferred construction. Fig. 8 is a side elevation of the knife shown in Fig. 7. Fig. 9 is a side elevation of a modification of my invention and shows a hand tool. Fig. 10 is a plan view of the same. Fig. 11 is a sectional View of the same taken on line IJ of Fig. 10. Fig. 12 is an enlarged View of a portion of the blade of the knife showing the V-shaped edge. Fig. 13 is a sectional View showing the operation of a pair of knives cutting the work piece.

In the drawings, 15 represents my knife Specification of Letters Patent.

Application filed October 16, 1911.

Patented Jan. 13, 1914. Serial No. 655,058.

blade which is made of thin steel, preferably of uniform thickness and which has preferably a V-shaped edge as shown enlarged at Fig. 12. This blade is secured in a holder 16. This holder, in Figs. 16, is shown as made in a single piece with the blade 15 disposed within a slot made in said holder. The holder 16 overlaps the entire surface of the blade 15 except that part thereof which passes into the work piece, so that the blade is adequately supported while it is in operation and is thus prevented from buckling.

In Figs. 4-6, 17 represent fragmental sections of the heads of a beam shearing machine to which the knife holders 16 are secured. When two knives are used as here shown, they are placed in the same vertical plane so that when they have cut through the work piece their edges nearly touch one another. In this form, the knife blade is exposed only enough to cut and penetrate one-half of the I-beam shown. The holder 16 at the ends 22 and 23 extend to the cutting edge of the blade, while the edge of the same at the center portion 2 1 is back from the cutting edge a distance equal to substantia ly one-half the thickness of the web of the Lbeam which is being cut. Recesses 25 and 26 are provided to allow the blade 15 to penetrate the flanges of the I-beam.

In Figs. 7 and 8, I have shown a modified form of cutting knife where the holder 18 is made of two interlocking parts 19 and 20, the raised portion 21 on the part 20 fitting into a co-acting groove in the part 19. The knife blade 15 in this form preferably bears up against the side of the raised portion 21. In this form of knife the holder is provided with a plurality of recesses for the flanges of a number of different sized I-beams,which recesses are represented by the numerals 27, 28, 29, 30, 31, 32, 33 and 34:. WVith a pair of knives of this form a number of different sized I-beams may be out without having to change the knives for each different size, as forinstance, with a pair of knives as shown in Fig. 7 a 15 inch I-beam may be cut by placing the flange thereof between the knives at the recesses 27 and 28; a 12 inch I-beam at recesses 27 and 30; a 10 inch I-beam at recesses 31 and 28; a 9 inch I-beam at recesses 29 and 30; an 8 inch I-beam at recesses 33 and 28; a 7 inch I-beam at recesses 31 and 30; a 5 inch I-beam at recesses 33 and 30; a

4 inch I-beam at recesses 31 and 34; and a 3inch I-beam at recesses 33 and 32. While I have shown and described my invention in connection with I-beams, it is obvious that the knives shown are equally applicable for cutting channel-iron, angle-iron and T-bar sections and with suitable modifications, within the scope of this invention, the holders may be made of suitable forms to cut Z- bars and rails as well as all special shapes of structural steel. The apertures shown in the knife holder are for the reception of suitable bolts (not shown) for securing the two parts of the holder 18 together and also for securing the same in place on av shearing machine.

In Figs. 9l1, I have shown my invention adapted to a hand tool. This tool is especially useful when coping large I-beams or performing operations of a like character. It is preferably made of one piece of material and is provided with a blade 35, along the side edges of which, and preferably on top and bottom, are flanges 36. These flanges begin at the cutting ed 'e of the blade and extend backward to the inner end thereof. At this point is provided a suitable handle 37 which besides serving as a means for holding and guiding the tool, also provides a place at the end thereof for applying the blows of the hammer-when the tool is being driven to its work.

In Fig. 13, I have shown a pair of knives in operation where it will be seen that the blades 15 have almost penetrated the work piece 38. The blades of my knife are so thin that when in operation they pass through the material without distorting the same and as the edges are V-shaped they cause a slight splitting action on the work piece just before the edges of the blades have come together which causes the two parts of the work piece to part before the blades have come close enough together to injure one another.

Obviously, if desired, the blade 15 may be provided with reinforcements, integral with the same and running at right angles to the cutting edge thereof and other modifications as to the details herein shown and described may be made without departing from the spirit of my invention and I do not wish to be limited to the exact embodiment herein shown and described.

Having thus described my invention, what I claimis:

1. As an article of manufacture, a fiatmetal-cutting knife, comprising a thin onepiece blade having a single unbroken cutting edge and a holder inclosing at, least three of the edges of said blade, said holder extending down the end edges of said blade to the cutting edge thereof and being cut away at a plurality of places, thus forming a plurality of recesses where the said blade is designed to enter the work piece and in substantially the form of standard structural steel shapes, whereby a plurality of said shapes of different sizes may be operated on with the same knife.

2. The combination with two cutter-heads oppositely arranged in registering position, of a pair of flat metal-cutting knives, each comprising a thin, single V-shape edged blade, having a single unbroken cutting edge, a holder, inclosing at least three of the edges of said blade and means for securing said blade to said holder, he holder of each of said knives extending down the end edges of the blade on each side thereof to the cutting edge thereof and being cut away where the said blade is designed to enter the work piece, and in substantially the form of said work piece.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

FRANK H. WILLIAMS.

\Vitnesses:

J. WM. ELLIS, WALTER H. KELLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, I). C. 

